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Spirits 15c And Spirits 14buu

Title: Spirits 15c And Spirits 14buu: Two Obscured Supernovae In The Nearby Star-forming Galaxy Ic 2163.
Name(s): Jencson, Jacob E., author
Kasliwal, Mansi M., author
Johansson, Joel, author
Contreras, Carlos, author
Castellon, Sergio, author
Bond, Howard E., author
Monson, Andrew J., author
Masci, Frank J., author
Cody, Ann Marie, author
Andrews, Jennifer E., author
Bally, John, author
Cao, Yi, author
Fox, Ori D., author
Gburek, Timothy, author
Gehrz, Robert D., author
Green, Wayne, author
Helou, George, author
Hsiao, Eric, author
Morrell, Nidia, author
Phillips, Mark, author
Prince, Thomas A., author
Simcoe, Robert A., author
Smith, Nathan, author
Tinyanont, Samaporn, author
Williams, Robert, author
Type of Resource: text
Genre: Journal Article
Journal Article
Date Issued: 2017-03-10
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: SPitzer InfraRed Intensive Transients Survey-SPIRITS-is an ongoing survey of nearby galaxies searching for infrared (IR) transients with Spitzer/IRAC. We present the discovery and follow-up observations of one of our most luminous (M-[4.5] = -17.1 +/- 0.4 mag, Vega) and reddest ([3.6] - [4.5] = 3.0 +/- 0.2 mag) transients, SPIRITS 15c. The transient was detected in a dusty spiral arm of IC. 2163 (D approximate to 35.5 Mpc). Pre-discovery ground-based imaging revealed an associated, shorter-duration transient in the optical and near-IR (NIR). NIR spectroscopy showed a broad (approximate to 8400 km s(-1)), double-peaked emission line of He I at 1.083 mu m, indicating an explosive origin. The NIR spectrum of SPIRITS 15c is similar to that of the Type IIb SN 2011dh at a phase of approximate to 200 days. Assuming an A(V) = 2.2 mag of extinction in SPIRITS 15c provides a good match between their optical light curves. The NIR light curves, however, show some minor discrepancies when compared with SN 2011dh, and the extreme [3.6]-[4.5] color has not been previously observed for any SN IIb. Another luminous (M-4.5 = -16.1 +/- 0.4 mag) event, SPIRITS 14buu, was serendipitously discovered in the same galaxy. The source displays an optical plateau lasting greater than or similar to 80 days, and we suggest a scenario similar to the low-luminosity Type. IIP SN 2005cs obscured by A(V) approximate to 1.5 mag. Other classes of IR-luminous transients can likely be ruled out in both cases. If both events are indeed SNe, this may suggest that greater than or similar to 18% of nearby core-collapse SNe are missed by currently operating optical surveys.
Identifier: FSU_libsubv1_wos_000398781300011 (IID), 10.3847/1538-4357/aa618f (DOI)
Keywords: supernovae: general, surveys, core-collapse supernovae, gamma-ray bursts, ii supernova, light-curves, luminous infrared galaxy, nuclear regions, photometric system, sn 2008s, space-telescope observations, starburst galaxies, supernovae: individual (SPIRITS 15c, SPIRITS 14buu)
Publication Note: The publisher's version of record is available at
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Host Institution: FSU
Is Part Of: Astrophysical Journal.
Issue: iss. 2, vol. 837

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Jencson, J. E., Kasliwal, M. M., Johansson, J., Contreras, C., Castellon, S., Bond, H. E., … Williams, R. (2017). Spirits 15c And Spirits 14buu: Two Obscured Supernovae In The Nearby Star-forming Galaxy Ic 2163. Astrophysical Journal. Retrieved from